Commit | Line | Data |
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b1acf338 | 1 | /* Target-dependent code for HP-UX on PA-RISC. |
ef6e7e13 | 2 | |
6aba47ca | 3 | Copyright (C) 2002, 2003, 2004, 2005, 2007 Free Software Foundation, Inc. |
273f8429 | 4 | |
b1acf338 | 5 | This file is part of GDB. |
273f8429 | 6 | |
b1acf338 MK |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
273f8429 | 11 | |
b1acf338 MK |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
273f8429 | 16 | |
b1acf338 MK |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
197e01b6 EZ |
19 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
20 | Boston, MA 02110-1301, USA. */ | |
273f8429 JB |
21 | |
22 | #include "defs.h" | |
23 | #include "arch-utils.h" | |
60e1ff27 | 24 | #include "gdbcore.h" |
273f8429 | 25 | #include "osabi.h" |
222e5d1d | 26 | #include "frame.h" |
43613416 RC |
27 | #include "frame-unwind.h" |
28 | #include "trad-frame.h" | |
4c02c60c AC |
29 | #include "symtab.h" |
30 | #include "objfiles.h" | |
31 | #include "inferior.h" | |
32 | #include "infcall.h" | |
90f943f1 | 33 | #include "observer.h" |
acf86d54 RC |
34 | #include "hppa-tdep.h" |
35 | #include "solib-som.h" | |
36 | #include "solib-pa64.h" | |
08d53055 | 37 | #include "regset.h" |
e7b17823 | 38 | #include "regcache.h" |
60250e8b | 39 | #include "exceptions.h" |
08d53055 MK |
40 | |
41 | #include "gdb_string.h" | |
4c02c60c | 42 | |
77d18ded RC |
43 | #define IS_32BIT_TARGET(_gdbarch) \ |
44 | ((gdbarch_tdep (_gdbarch))->bytes_per_address == 4) | |
45 | ||
27b08a0c RC |
46 | /* Bit in the `ss_flag' member of `struct save_state' that indicates |
47 | that the 64-bit register values are live. From | |
48 | <machine/save_state.h>. */ | |
49 | #define HPPA_HPUX_SS_WIDEREGS 0x40 | |
50 | ||
51 | /* Offsets of various parts of `struct save_state'. From | |
52 | <machine/save_state.h>. */ | |
53 | #define HPPA_HPUX_SS_FLAGS_OFFSET 0 | |
54 | #define HPPA_HPUX_SS_NARROW_OFFSET 4 | |
55 | #define HPPA_HPUX_SS_FPBLOCK_OFFSET 256 | |
56 | #define HPPA_HPUX_SS_WIDE_OFFSET 640 | |
57 | ||
58 | /* The size of `struct save_state. */ | |
59 | #define HPPA_HPUX_SAVE_STATE_SIZE 1152 | |
60 | ||
61 | /* The size of `struct pa89_save_state', which corresponds to PA-RISC | |
62 | 1.1, the lowest common denominator that we support. */ | |
63 | #define HPPA_HPUX_PA89_SAVE_STATE_SIZE 512 | |
64 | ||
65 | ||
273f8429 JB |
66 | /* Forward declarations. */ |
67 | extern void _initialize_hppa_hpux_tdep (void); | |
68 | extern initialize_file_ftype _initialize_hppa_hpux_tdep; | |
69 | ||
77d18ded RC |
70 | static int |
71 | in_opd_section (CORE_ADDR pc) | |
72 | { | |
73 | struct obj_section *s; | |
74 | int retval = 0; | |
75 | ||
76 | s = find_pc_section (pc); | |
77 | ||
78 | retval = (s != NULL | |
79 | && s->the_bfd_section->name != NULL | |
80 | && strcmp (s->the_bfd_section->name, ".opd") == 0); | |
81 | return (retval); | |
82 | } | |
83 | ||
abc485a1 RC |
84 | /* Return one if PC is in the call path of a trampoline, else return zero. |
85 | ||
86 | Note we return one for *any* call trampoline (long-call, arg-reloc), not | |
87 | just shared library trampolines (import, export). */ | |
88 | ||
89 | static int | |
90 | hppa32_hpux_in_solib_call_trampoline (CORE_ADDR pc, char *name) | |
91 | { | |
92 | struct minimal_symbol *minsym; | |
93 | struct unwind_table_entry *u; | |
abc485a1 RC |
94 | |
95 | /* First see if PC is in one of the two C-library trampolines. */ | |
3388d7ff RC |
96 | if (pc == hppa_symbol_address("$$dyncall") |
97 | || pc == hppa_symbol_address("_sr4export")) | |
abc485a1 RC |
98 | return 1; |
99 | ||
100 | minsym = lookup_minimal_symbol_by_pc (pc); | |
101 | if (minsym && strcmp (DEPRECATED_SYMBOL_NAME (minsym), ".stub") == 0) | |
102 | return 1; | |
103 | ||
104 | /* Get the unwind descriptor corresponding to PC, return zero | |
105 | if no unwind was found. */ | |
106 | u = find_unwind_entry (pc); | |
107 | if (!u) | |
108 | return 0; | |
109 | ||
110 | /* If this isn't a linker stub, then return now. */ | |
111 | if (u->stub_unwind.stub_type == 0) | |
112 | return 0; | |
113 | ||
114 | /* By definition a long-branch stub is a call stub. */ | |
115 | if (u->stub_unwind.stub_type == LONG_BRANCH) | |
116 | return 1; | |
117 | ||
118 | /* The call and return path execute the same instructions within | |
119 | an IMPORT stub! So an IMPORT stub is both a call and return | |
120 | trampoline. */ | |
121 | if (u->stub_unwind.stub_type == IMPORT) | |
122 | return 1; | |
123 | ||
124 | /* Parameter relocation stubs always have a call path and may have a | |
125 | return path. */ | |
126 | if (u->stub_unwind.stub_type == PARAMETER_RELOCATION | |
127 | || u->stub_unwind.stub_type == EXPORT) | |
128 | { | |
129 | CORE_ADDR addr; | |
130 | ||
131 | /* Search forward from the current PC until we hit a branch | |
132 | or the end of the stub. */ | |
133 | for (addr = pc; addr <= u->region_end; addr += 4) | |
134 | { | |
135 | unsigned long insn; | |
136 | ||
137 | insn = read_memory_integer (addr, 4); | |
138 | ||
139 | /* Does it look like a bl? If so then it's the call path, if | |
140 | we find a bv or be first, then we're on the return path. */ | |
141 | if ((insn & 0xfc00e000) == 0xe8000000) | |
142 | return 1; | |
143 | else if ((insn & 0xfc00e001) == 0xe800c000 | |
144 | || (insn & 0xfc000000) == 0xe0000000) | |
145 | return 0; | |
146 | } | |
147 | ||
148 | /* Should never happen. */ | |
8a3fe4f8 | 149 | warning (_("Unable to find branch in parameter relocation stub.")); |
abc485a1 RC |
150 | return 0; |
151 | } | |
152 | ||
153 | /* Unknown stub type. For now, just return zero. */ | |
154 | return 0; | |
155 | } | |
156 | ||
157 | static int | |
158 | hppa64_hpux_in_solib_call_trampoline (CORE_ADDR pc, char *name) | |
159 | { | |
160 | /* PA64 has a completely different stub/trampoline scheme. Is it | |
161 | better? Maybe. It's certainly harder to determine with any | |
162 | certainty that we are in a stub because we can not refer to the | |
163 | unwinders to help. | |
164 | ||
165 | The heuristic is simple. Try to lookup the current PC value in th | |
166 | minimal symbol table. If that fails, then assume we are not in a | |
167 | stub and return. | |
168 | ||
169 | Then see if the PC value falls within the section bounds for the | |
170 | section containing the minimal symbol we found in the first | |
171 | step. If it does, then assume we are not in a stub and return. | |
172 | ||
173 | Finally peek at the instructions to see if they look like a stub. */ | |
174 | struct minimal_symbol *minsym; | |
175 | asection *sec; | |
176 | CORE_ADDR addr; | |
177 | int insn, i; | |
178 | ||
179 | minsym = lookup_minimal_symbol_by_pc (pc); | |
180 | if (! minsym) | |
181 | return 0; | |
182 | ||
183 | sec = SYMBOL_BFD_SECTION (minsym); | |
184 | ||
185 | if (bfd_get_section_vma (sec->owner, sec) <= pc | |
186 | && pc < (bfd_get_section_vma (sec->owner, sec) | |
187 | + bfd_section_size (sec->owner, sec))) | |
188 | return 0; | |
189 | ||
190 | /* We might be in a stub. Peek at the instructions. Stubs are 3 | |
191 | instructions long. */ | |
192 | insn = read_memory_integer (pc, 4); | |
193 | ||
194 | /* Find out where we think we are within the stub. */ | |
195 | if ((insn & 0xffffc00e) == 0x53610000) | |
196 | addr = pc; | |
197 | else if ((insn & 0xffffffff) == 0xe820d000) | |
198 | addr = pc - 4; | |
199 | else if ((insn & 0xffffc00e) == 0x537b0000) | |
200 | addr = pc - 8; | |
201 | else | |
202 | return 0; | |
203 | ||
204 | /* Now verify each insn in the range looks like a stub instruction. */ | |
205 | insn = read_memory_integer (addr, 4); | |
206 | if ((insn & 0xffffc00e) != 0x53610000) | |
207 | return 0; | |
208 | ||
209 | /* Now verify each insn in the range looks like a stub instruction. */ | |
210 | insn = read_memory_integer (addr + 4, 4); | |
211 | if ((insn & 0xffffffff) != 0xe820d000) | |
212 | return 0; | |
213 | ||
214 | /* Now verify each insn in the range looks like a stub instruction. */ | |
215 | insn = read_memory_integer (addr + 8, 4); | |
216 | if ((insn & 0xffffc00e) != 0x537b0000) | |
217 | return 0; | |
218 | ||
219 | /* Looks like a stub. */ | |
220 | return 1; | |
221 | } | |
222 | ||
223 | /* Return one if PC is in the return path of a trampoline, else return zero. | |
224 | ||
225 | Note we return one for *any* call trampoline (long-call, arg-reloc), not | |
226 | just shared library trampolines (import, export). */ | |
227 | ||
228 | static int | |
229 | hppa_hpux_in_solib_return_trampoline (CORE_ADDR pc, char *name) | |
230 | { | |
231 | struct unwind_table_entry *u; | |
232 | ||
233 | /* Get the unwind descriptor corresponding to PC, return zero | |
234 | if no unwind was found. */ | |
235 | u = find_unwind_entry (pc); | |
236 | if (!u) | |
237 | return 0; | |
238 | ||
239 | /* If this isn't a linker stub or it's just a long branch stub, then | |
240 | return zero. */ | |
241 | if (u->stub_unwind.stub_type == 0 || u->stub_unwind.stub_type == LONG_BRANCH) | |
242 | return 0; | |
243 | ||
244 | /* The call and return path execute the same instructions within | |
245 | an IMPORT stub! So an IMPORT stub is both a call and return | |
246 | trampoline. */ | |
247 | if (u->stub_unwind.stub_type == IMPORT) | |
248 | return 1; | |
249 | ||
250 | /* Parameter relocation stubs always have a call path and may have a | |
251 | return path. */ | |
252 | if (u->stub_unwind.stub_type == PARAMETER_RELOCATION | |
253 | || u->stub_unwind.stub_type == EXPORT) | |
254 | { | |
255 | CORE_ADDR addr; | |
256 | ||
257 | /* Search forward from the current PC until we hit a branch | |
258 | or the end of the stub. */ | |
259 | for (addr = pc; addr <= u->region_end; addr += 4) | |
260 | { | |
261 | unsigned long insn; | |
262 | ||
263 | insn = read_memory_integer (addr, 4); | |
264 | ||
265 | /* Does it look like a bl? If so then it's the call path, if | |
266 | we find a bv or be first, then we're on the return path. */ | |
267 | if ((insn & 0xfc00e000) == 0xe8000000) | |
268 | return 0; | |
269 | else if ((insn & 0xfc00e001) == 0xe800c000 | |
270 | || (insn & 0xfc000000) == 0xe0000000) | |
271 | return 1; | |
272 | } | |
273 | ||
274 | /* Should never happen. */ | |
8a3fe4f8 | 275 | warning (_("Unable to find branch in parameter relocation stub.")); |
abc485a1 RC |
276 | return 0; |
277 | } | |
278 | ||
279 | /* Unknown stub type. For now, just return zero. */ | |
280 | return 0; | |
281 | ||
282 | } | |
283 | ||
284 | /* Figure out if PC is in a trampoline, and if so find out where | |
285 | the trampoline will jump to. If not in a trampoline, return zero. | |
286 | ||
287 | Simple code examination probably is not a good idea since the code | |
288 | sequences in trampolines can also appear in user code. | |
289 | ||
290 | We use unwinds and information from the minimal symbol table to | |
291 | determine when we're in a trampoline. This won't work for ELF | |
292 | (yet) since it doesn't create stub unwind entries. Whether or | |
293 | not ELF will create stub unwinds or normal unwinds for linker | |
294 | stubs is still being debated. | |
295 | ||
296 | This should handle simple calls through dyncall or sr4export, | |
297 | long calls, argument relocation stubs, and dyncall/sr4export | |
298 | calling an argument relocation stub. It even handles some stubs | |
299 | used in dynamic executables. */ | |
300 | ||
301 | static CORE_ADDR | |
52f729a7 | 302 | hppa_hpux_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc) |
abc485a1 RC |
303 | { |
304 | long orig_pc = pc; | |
305 | long prev_inst, curr_inst, loc; | |
abc485a1 RC |
306 | struct minimal_symbol *msym; |
307 | struct unwind_table_entry *u; | |
308 | ||
abc485a1 RC |
309 | /* Addresses passed to dyncall may *NOT* be the actual address |
310 | of the function. So we may have to do something special. */ | |
3388d7ff | 311 | if (pc == hppa_symbol_address("$$dyncall")) |
abc485a1 | 312 | { |
52f729a7 | 313 | pc = (CORE_ADDR) get_frame_register_unsigned (frame, 22); |
abc485a1 RC |
314 | |
315 | /* If bit 30 (counting from the left) is on, then pc is the address of | |
316 | the PLT entry for this function, not the address of the function | |
317 | itself. Bit 31 has meaning too, but only for MPE. */ | |
318 | if (pc & 0x2) | |
819844ad UW |
319 | pc = (CORE_ADDR) read_memory_integer |
320 | (pc & ~0x3, gdbarch_ptr_bit (current_gdbarch) / 8); | |
abc485a1 | 321 | } |
3388d7ff | 322 | if (pc == hppa_symbol_address("$$dyncall_external")) |
abc485a1 | 323 | { |
52f729a7 | 324 | pc = (CORE_ADDR) get_frame_register_unsigned (frame, 22); |
819844ad UW |
325 | pc = (CORE_ADDR) read_memory_integer |
326 | (pc & ~0x3, gdbarch_ptr_bit (current_gdbarch) / 8); | |
abc485a1 | 327 | } |
3388d7ff | 328 | else if (pc == hppa_symbol_address("_sr4export")) |
52f729a7 | 329 | pc = (CORE_ADDR) get_frame_register_unsigned (frame, 22); |
abc485a1 RC |
330 | |
331 | /* Get the unwind descriptor corresponding to PC, return zero | |
332 | if no unwind was found. */ | |
333 | u = find_unwind_entry (pc); | |
334 | if (!u) | |
335 | return 0; | |
336 | ||
337 | /* If this isn't a linker stub, then return now. */ | |
338 | /* elz: attention here! (FIXME) because of a compiler/linker | |
339 | error, some stubs which should have a non zero stub_unwind.stub_type | |
340 | have unfortunately a value of zero. So this function would return here | |
341 | as if we were not in a trampoline. To fix this, we go look at the partial | |
342 | symbol information, which reports this guy as a stub. | |
343 | (FIXME): Unfortunately, we are not that lucky: it turns out that the | |
344 | partial symbol information is also wrong sometimes. This is because | |
345 | when it is entered (somread.c::som_symtab_read()) it can happen that | |
346 | if the type of the symbol (from the som) is Entry, and the symbol is | |
347 | in a shared library, then it can also be a trampoline. This would | |
348 | be OK, except that I believe the way they decide if we are ina shared library | |
349 | does not work. SOOOO..., even if we have a regular function w/o trampolines | |
350 | its minimal symbol can be assigned type mst_solib_trampoline. | |
351 | Also, if we find that the symbol is a real stub, then we fix the unwind | |
352 | descriptor, and define the stub type to be EXPORT. | |
353 | Hopefully this is correct most of the times. */ | |
354 | if (u->stub_unwind.stub_type == 0) | |
355 | { | |
356 | ||
357 | /* elz: NOTE (FIXME!) once the problem with the unwind information is fixed | |
358 | we can delete all the code which appears between the lines */ | |
359 | /*--------------------------------------------------------------------------*/ | |
360 | msym = lookup_minimal_symbol_by_pc (pc); | |
361 | ||
362 | if (msym == NULL || MSYMBOL_TYPE (msym) != mst_solib_trampoline) | |
363 | return orig_pc == pc ? 0 : pc & ~0x3; | |
364 | ||
365 | else if (msym != NULL && MSYMBOL_TYPE (msym) == mst_solib_trampoline) | |
366 | { | |
367 | struct objfile *objfile; | |
368 | struct minimal_symbol *msymbol; | |
369 | int function_found = 0; | |
370 | ||
371 | /* go look if there is another minimal symbol with the same name as | |
372 | this one, but with type mst_text. This would happen if the msym | |
373 | is an actual trampoline, in which case there would be another | |
374 | symbol with the same name corresponding to the real function */ | |
375 | ||
376 | ALL_MSYMBOLS (objfile, msymbol) | |
377 | { | |
378 | if (MSYMBOL_TYPE (msymbol) == mst_text | |
379 | && DEPRECATED_STREQ (DEPRECATED_SYMBOL_NAME (msymbol), DEPRECATED_SYMBOL_NAME (msym))) | |
380 | { | |
381 | function_found = 1; | |
382 | break; | |
383 | } | |
384 | } | |
385 | ||
386 | if (function_found) | |
387 | /* the type of msym is correct (mst_solib_trampoline), but | |
388 | the unwind info is wrong, so set it to the correct value */ | |
389 | u->stub_unwind.stub_type = EXPORT; | |
390 | else | |
391 | /* the stub type info in the unwind is correct (this is not a | |
392 | trampoline), but the msym type information is wrong, it | |
393 | should be mst_text. So we need to fix the msym, and also | |
394 | get out of this function */ | |
395 | { | |
396 | MSYMBOL_TYPE (msym) = mst_text; | |
397 | return orig_pc == pc ? 0 : pc & ~0x3; | |
398 | } | |
399 | } | |
400 | ||
401 | /*--------------------------------------------------------------------------*/ | |
402 | } | |
403 | ||
404 | /* It's a stub. Search for a branch and figure out where it goes. | |
405 | Note we have to handle multi insn branch sequences like ldil;ble. | |
406 | Most (all?) other branches can be determined by examining the contents | |
407 | of certain registers and the stack. */ | |
408 | ||
409 | loc = pc; | |
410 | curr_inst = 0; | |
411 | prev_inst = 0; | |
412 | while (1) | |
413 | { | |
414 | /* Make sure we haven't walked outside the range of this stub. */ | |
415 | if (u != find_unwind_entry (loc)) | |
416 | { | |
8a3fe4f8 | 417 | warning (_("Unable to find branch in linker stub")); |
abc485a1 RC |
418 | return orig_pc == pc ? 0 : pc & ~0x3; |
419 | } | |
420 | ||
421 | prev_inst = curr_inst; | |
422 | curr_inst = read_memory_integer (loc, 4); | |
423 | ||
424 | /* Does it look like a branch external using %r1? Then it's the | |
425 | branch from the stub to the actual function. */ | |
426 | if ((curr_inst & 0xffe0e000) == 0xe0202000) | |
427 | { | |
428 | /* Yup. See if the previous instruction loaded | |
429 | a value into %r1. If so compute and return the jump address. */ | |
430 | if ((prev_inst & 0xffe00000) == 0x20200000) | |
431 | return (hppa_extract_21 (prev_inst) + hppa_extract_17 (curr_inst)) & ~0x3; | |
432 | else | |
433 | { | |
8a3fe4f8 | 434 | warning (_("Unable to find ldil X,%%r1 before ble Y(%%sr4,%%r1).")); |
abc485a1 RC |
435 | return orig_pc == pc ? 0 : pc & ~0x3; |
436 | } | |
437 | } | |
438 | ||
439 | /* Does it look like a be 0(sr0,%r21)? OR | |
440 | Does it look like a be, n 0(sr0,%r21)? OR | |
441 | Does it look like a bve (r21)? (this is on PA2.0) | |
442 | Does it look like a bve, n(r21)? (this is also on PA2.0) | |
443 | That's the branch from an | |
444 | import stub to an export stub. | |
445 | ||
446 | It is impossible to determine the target of the branch via | |
447 | simple examination of instructions and/or data (consider | |
448 | that the address in the plabel may be the address of the | |
449 | bind-on-reference routine in the dynamic loader). | |
450 | ||
451 | So we have try an alternative approach. | |
452 | ||
453 | Get the name of the symbol at our current location; it should | |
454 | be a stub symbol with the same name as the symbol in the | |
455 | shared library. | |
456 | ||
457 | Then lookup a minimal symbol with the same name; we should | |
458 | get the minimal symbol for the target routine in the shared | |
459 | library as those take precedence of import/export stubs. */ | |
460 | if ((curr_inst == 0xe2a00000) || | |
461 | (curr_inst == 0xe2a00002) || | |
462 | (curr_inst == 0xeaa0d000) || | |
463 | (curr_inst == 0xeaa0d002)) | |
464 | { | |
465 | struct minimal_symbol *stubsym, *libsym; | |
466 | ||
467 | stubsym = lookup_minimal_symbol_by_pc (loc); | |
468 | if (stubsym == NULL) | |
469 | { | |
8a3fe4f8 | 470 | warning (_("Unable to find symbol for 0x%lx"), loc); |
abc485a1 RC |
471 | return orig_pc == pc ? 0 : pc & ~0x3; |
472 | } | |
473 | ||
474 | libsym = lookup_minimal_symbol (DEPRECATED_SYMBOL_NAME (stubsym), NULL, NULL); | |
475 | if (libsym == NULL) | |
476 | { | |
8a3fe4f8 | 477 | warning (_("Unable to find library symbol for %s."), |
abc485a1 RC |
478 | DEPRECATED_SYMBOL_NAME (stubsym)); |
479 | return orig_pc == pc ? 0 : pc & ~0x3; | |
480 | } | |
481 | ||
482 | return SYMBOL_VALUE (libsym); | |
483 | } | |
484 | ||
485 | /* Does it look like bl X,%rp or bl X,%r0? Another way to do a | |
486 | branch from the stub to the actual function. */ | |
487 | /*elz */ | |
488 | else if ((curr_inst & 0xffe0e000) == 0xe8400000 | |
489 | || (curr_inst & 0xffe0e000) == 0xe8000000 | |
490 | || (curr_inst & 0xffe0e000) == 0xe800A000) | |
491 | return (loc + hppa_extract_17 (curr_inst) + 8) & ~0x3; | |
492 | ||
493 | /* Does it look like bv (rp)? Note this depends on the | |
494 | current stack pointer being the same as the stack | |
495 | pointer in the stub itself! This is a branch on from the | |
496 | stub back to the original caller. */ | |
497 | /*else if ((curr_inst & 0xffe0e000) == 0xe840c000) */ | |
498 | else if ((curr_inst & 0xffe0f000) == 0xe840c000) | |
499 | { | |
500 | /* Yup. See if the previous instruction loaded | |
501 | rp from sp - 8. */ | |
502 | if (prev_inst == 0x4bc23ff1) | |
52f729a7 UW |
503 | { |
504 | CORE_ADDR sp; | |
505 | sp = get_frame_register_unsigned (frame, HPPA_SP_REGNUM); | |
506 | return read_memory_integer (sp - 8, 4) & ~0x3; | |
507 | } | |
abc485a1 RC |
508 | else |
509 | { | |
8a3fe4f8 | 510 | warning (_("Unable to find restore of %%rp before bv (%%rp).")); |
abc485a1 RC |
511 | return orig_pc == pc ? 0 : pc & ~0x3; |
512 | } | |
513 | } | |
514 | ||
515 | /* elz: added this case to capture the new instruction | |
516 | at the end of the return part of an export stub used by | |
517 | the PA2.0: BVE, n (rp) */ | |
518 | else if ((curr_inst & 0xffe0f000) == 0xe840d000) | |
519 | { | |
520 | return (read_memory_integer | |
52f729a7 | 521 | (get_frame_register_unsigned (frame, HPPA_SP_REGNUM) - 24, |
819844ad | 522 | gdbarch_ptr_bit (current_gdbarch) / 8)) & ~0x3; |
abc485a1 RC |
523 | } |
524 | ||
525 | /* What about be,n 0(sr0,%rp)? It's just another way we return to | |
526 | the original caller from the stub. Used in dynamic executables. */ | |
527 | else if (curr_inst == 0xe0400002) | |
528 | { | |
529 | /* The value we jump to is sitting in sp - 24. But that's | |
530 | loaded several instructions before the be instruction. | |
531 | I guess we could check for the previous instruction being | |
532 | mtsp %r1,%sr0 if we want to do sanity checking. */ | |
533 | return (read_memory_integer | |
52f729a7 | 534 | (get_frame_register_unsigned (frame, HPPA_SP_REGNUM) - 24, |
819844ad | 535 | gdbarch_ptr_bit (current_gdbarch) / 8)) & ~0x3; |
abc485a1 RC |
536 | } |
537 | ||
538 | /* Haven't found the branch yet, but we're still in the stub. | |
539 | Keep looking. */ | |
540 | loc += 4; | |
541 | } | |
542 | } | |
543 | ||
6d350bb5 UW |
544 | static void |
545 | hppa_skip_permanent_breakpoint (struct regcache *regcache) | |
5aac166f RC |
546 | { |
547 | /* To step over a breakpoint instruction on the PA takes some | |
548 | fiddling with the instruction address queue. | |
549 | ||
550 | When we stop at a breakpoint, the IA queue front (the instruction | |
551 | we're executing now) points at the breakpoint instruction, and | |
552 | the IA queue back (the next instruction to execute) points to | |
553 | whatever instruction we would execute after the breakpoint, if it | |
554 | were an ordinary instruction. This is the case even if the | |
555 | breakpoint is in the delay slot of a branch instruction. | |
556 | ||
557 | Clearly, to step past the breakpoint, we need to set the queue | |
558 | front to the back. But what do we put in the back? What | |
559 | instruction comes after that one? Because of the branch delay | |
560 | slot, the next insn is always at the back + 4. */ | |
5aac166f | 561 | |
6d350bb5 UW |
562 | ULONGEST pcoq_tail, pcsq_tail; |
563 | regcache_cooked_read_unsigned (regcache, HPPA_PCOQ_TAIL_REGNUM, &pcoq_tail); | |
564 | regcache_cooked_read_unsigned (regcache, HPPA_PCSQ_TAIL_REGNUM, &pcsq_tail); | |
565 | ||
566 | regcache_cooked_write_unsigned (regcache, HPPA_PCOQ_HEAD_REGNUM, pcoq_tail); | |
567 | regcache_cooked_write_unsigned (regcache, HPPA_PCSQ_HEAD_REGNUM, pcsq_tail); | |
568 | ||
569 | regcache_cooked_write_unsigned (regcache, HPPA_PCOQ_TAIL_REGNUM, pcoq_tail + 4); | |
5aac166f RC |
570 | /* We can leave the tail's space the same, since there's no jump. */ |
571 | } | |
abc485a1 | 572 | |
4c02c60c | 573 | |
43613416 RC |
574 | /* Signal frames. */ |
575 | struct hppa_hpux_sigtramp_unwind_cache | |
576 | { | |
577 | CORE_ADDR base; | |
578 | struct trad_frame_saved_reg *saved_regs; | |
579 | }; | |
580 | ||
581 | static int hppa_hpux_tramp_reg[] = { | |
582 | HPPA_SAR_REGNUM, | |
583 | HPPA_PCOQ_HEAD_REGNUM, | |
584 | HPPA_PCSQ_HEAD_REGNUM, | |
585 | HPPA_PCOQ_TAIL_REGNUM, | |
586 | HPPA_PCSQ_TAIL_REGNUM, | |
587 | HPPA_EIEM_REGNUM, | |
588 | HPPA_IIR_REGNUM, | |
589 | HPPA_ISR_REGNUM, | |
590 | HPPA_IOR_REGNUM, | |
591 | HPPA_IPSW_REGNUM, | |
592 | -1, | |
593 | HPPA_SR4_REGNUM, | |
594 | HPPA_SR4_REGNUM + 1, | |
595 | HPPA_SR4_REGNUM + 2, | |
596 | HPPA_SR4_REGNUM + 3, | |
597 | HPPA_SR4_REGNUM + 4, | |
598 | HPPA_SR4_REGNUM + 5, | |
599 | HPPA_SR4_REGNUM + 6, | |
600 | HPPA_SR4_REGNUM + 7, | |
601 | HPPA_RCR_REGNUM, | |
602 | HPPA_PID0_REGNUM, | |
603 | HPPA_PID1_REGNUM, | |
604 | HPPA_CCR_REGNUM, | |
605 | HPPA_PID2_REGNUM, | |
606 | HPPA_PID3_REGNUM, | |
607 | HPPA_TR0_REGNUM, | |
608 | HPPA_TR0_REGNUM + 1, | |
609 | HPPA_TR0_REGNUM + 2, | |
610 | HPPA_CR27_REGNUM | |
611 | }; | |
612 | ||
613 | static struct hppa_hpux_sigtramp_unwind_cache * | |
614 | hppa_hpux_sigtramp_frame_unwind_cache (struct frame_info *next_frame, | |
615 | void **this_cache) | |
616 | ||
617 | { | |
618 | struct gdbarch *gdbarch = get_frame_arch (next_frame); | |
619 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
620 | struct hppa_hpux_sigtramp_unwind_cache *info; | |
621 | unsigned int flag; | |
27b08a0c RC |
622 | CORE_ADDR sp, scptr, off; |
623 | int i, incr, szoff; | |
43613416 RC |
624 | |
625 | if (*this_cache) | |
626 | return *this_cache; | |
627 | ||
628 | info = FRAME_OBSTACK_ZALLOC (struct hppa_hpux_sigtramp_unwind_cache); | |
629 | *this_cache = info; | |
630 | info->saved_regs = trad_frame_alloc_saved_regs (next_frame); | |
631 | ||
632 | sp = frame_unwind_register_unsigned (next_frame, HPPA_SP_REGNUM); | |
633 | ||
27b08a0c RC |
634 | if (IS_32BIT_TARGET (gdbarch)) |
635 | scptr = sp - 1352; | |
636 | else | |
637 | scptr = sp - 1520; | |
638 | ||
43613416 RC |
639 | off = scptr; |
640 | ||
641 | /* See /usr/include/machine/save_state.h for the structure of the save_state_t | |
642 | structure. */ | |
643 | ||
27b08a0c RC |
644 | flag = read_memory_unsigned_integer(scptr + HPPA_HPUX_SS_FLAGS_OFFSET, 4); |
645 | ||
646 | if (!(flag & HPPA_HPUX_SS_WIDEREGS)) | |
43613416 RC |
647 | { |
648 | /* Narrow registers. */ | |
27b08a0c | 649 | off = scptr + HPPA_HPUX_SS_NARROW_OFFSET; |
43613416 RC |
650 | incr = 4; |
651 | szoff = 0; | |
652 | } | |
653 | else | |
654 | { | |
655 | /* Wide registers. */ | |
27b08a0c | 656 | off = scptr + HPPA_HPUX_SS_WIDE_OFFSET + 8; |
43613416 RC |
657 | incr = 8; |
658 | szoff = (tdep->bytes_per_address == 4 ? 4 : 0); | |
659 | } | |
660 | ||
661 | for (i = 1; i < 32; i++) | |
662 | { | |
663 | info->saved_regs[HPPA_R0_REGNUM + i].addr = off + szoff; | |
664 | off += incr; | |
665 | } | |
666 | ||
01926a69 | 667 | for (i = 0; i < ARRAY_SIZE (hppa_hpux_tramp_reg); i++) |
43613416 RC |
668 | { |
669 | if (hppa_hpux_tramp_reg[i] > 0) | |
670 | info->saved_regs[hppa_hpux_tramp_reg[i]].addr = off + szoff; | |
27b08a0c | 671 | |
43613416 RC |
672 | off += incr; |
673 | } | |
674 | ||
675 | /* TODO: fp regs */ | |
676 | ||
677 | info->base = frame_unwind_register_unsigned (next_frame, HPPA_SP_REGNUM); | |
678 | ||
679 | return info; | |
680 | } | |
681 | ||
682 | static void | |
683 | hppa_hpux_sigtramp_frame_this_id (struct frame_info *next_frame, | |
684 | void **this_prologue_cache, | |
685 | struct frame_id *this_id) | |
686 | { | |
687 | struct hppa_hpux_sigtramp_unwind_cache *info | |
688 | = hppa_hpux_sigtramp_frame_unwind_cache (next_frame, this_prologue_cache); | |
689 | *this_id = frame_id_build (info->base, frame_pc_unwind (next_frame)); | |
690 | } | |
691 | ||
692 | static void | |
693 | hppa_hpux_sigtramp_frame_prev_register (struct frame_info *next_frame, | |
a7aad9aa MK |
694 | void **this_prologue_cache, |
695 | int regnum, int *optimizedp, | |
696 | enum lval_type *lvalp, | |
697 | CORE_ADDR *addrp, | |
698 | int *realnump, gdb_byte *valuep) | |
43613416 RC |
699 | { |
700 | struct hppa_hpux_sigtramp_unwind_cache *info | |
701 | = hppa_hpux_sigtramp_frame_unwind_cache (next_frame, this_prologue_cache); | |
702 | hppa_frame_prev_register_helper (next_frame, info->saved_regs, regnum, | |
703 | optimizedp, lvalp, addrp, realnump, valuep); | |
704 | } | |
705 | ||
706 | static const struct frame_unwind hppa_hpux_sigtramp_frame_unwind = { | |
707 | SIGTRAMP_FRAME, | |
708 | hppa_hpux_sigtramp_frame_this_id, | |
709 | hppa_hpux_sigtramp_frame_prev_register | |
710 | }; | |
711 | ||
712 | static const struct frame_unwind * | |
713 | hppa_hpux_sigtramp_unwind_sniffer (struct frame_info *next_frame) | |
714 | { | |
765697c9 | 715 | struct unwind_table_entry *u; |
43613416 | 716 | CORE_ADDR pc = frame_pc_unwind (next_frame); |
43613416 | 717 | |
765697c9 | 718 | u = find_unwind_entry (pc); |
43613416 | 719 | |
a717134b MK |
720 | /* If this is an export stub, try to get the unwind descriptor for |
721 | the actual function itself. */ | |
722 | if (u && u->stub_unwind.stub_type == EXPORT) | |
723 | { | |
724 | gdb_byte buf[HPPA_INSN_SIZE]; | |
725 | unsigned long insn; | |
726 | ||
727 | if (!safe_frame_unwind_memory (next_frame, u->region_start, | |
728 | buf, sizeof buf)) | |
729 | return NULL; | |
730 | ||
731 | insn = extract_unsigned_integer (buf, sizeof buf); | |
732 | if ((insn & 0xffe0e000) == 0xe8400000) | |
733 | u = find_unwind_entry(u->region_start + hppa_extract_17 (insn) + 8); | |
734 | } | |
735 | ||
765697c9 | 736 | if (u && u->HP_UX_interrupt_marker) |
43613416 RC |
737 | return &hppa_hpux_sigtramp_frame_unwind; |
738 | ||
739 | return NULL; | |
740 | } | |
741 | ||
c268433a | 742 | static CORE_ADDR |
77d18ded | 743 | hppa32_hpux_find_global_pointer (struct value *function) |
c268433a RC |
744 | { |
745 | CORE_ADDR faddr; | |
746 | ||
747 | faddr = value_as_address (function); | |
748 | ||
749 | /* Is this a plabel? If so, dereference it to get the gp value. */ | |
750 | if (faddr & 2) | |
751 | { | |
752 | int status; | |
753 | char buf[4]; | |
754 | ||
755 | faddr &= ~3; | |
756 | ||
757 | status = target_read_memory (faddr + 4, buf, sizeof (buf)); | |
758 | if (status == 0) | |
759 | return extract_unsigned_integer (buf, sizeof (buf)); | |
760 | } | |
761 | ||
61aff869 | 762 | return gdbarch_tdep (current_gdbarch)->solib_get_got_by_pc (faddr); |
c268433a RC |
763 | } |
764 | ||
765 | static CORE_ADDR | |
77d18ded | 766 | hppa64_hpux_find_global_pointer (struct value *function) |
c268433a | 767 | { |
77d18ded RC |
768 | CORE_ADDR faddr; |
769 | char buf[32]; | |
770 | ||
771 | faddr = value_as_address (function); | |
772 | ||
773 | if (in_opd_section (faddr)) | |
774 | { | |
775 | target_read_memory (faddr, buf, sizeof (buf)); | |
776 | return extract_unsigned_integer (&buf[24], 8); | |
777 | } | |
778 | else | |
c268433a | 779 | { |
77d18ded RC |
780 | return gdbarch_tdep (current_gdbarch)->solib_get_got_by_pc (faddr); |
781 | } | |
782 | } | |
783 | ||
784 | static unsigned int ldsid_pattern[] = { | |
785 | 0x000010a0, /* ldsid (rX),rY */ | |
786 | 0x00001820, /* mtsp rY,sr0 */ | |
787 | 0xe0000000 /* be,n (sr0,rX) */ | |
788 | }; | |
789 | ||
790 | static CORE_ADDR | |
791 | hppa_hpux_search_pattern (CORE_ADDR start, CORE_ADDR end, | |
792 | unsigned int *patterns, int count) | |
793 | { | |
d275c051 MK |
794 | int num_insns = (end - start + HPPA_INSN_SIZE) / HPPA_INSN_SIZE; |
795 | unsigned int *insns; | |
796 | gdb_byte *buf; | |
77d18ded | 797 | int offset, i; |
77d18ded | 798 | |
d275c051 MK |
799 | buf = alloca (num_insns * HPPA_INSN_SIZE); |
800 | insns = alloca (num_insns * sizeof (unsigned int)); | |
c268433a | 801 | |
d275c051 MK |
802 | read_memory (start, buf, num_insns * HPPA_INSN_SIZE); |
803 | for (i = 0; i < num_insns; i++, buf += HPPA_INSN_SIZE) | |
804 | insns[i] = extract_unsigned_integer (buf, HPPA_INSN_SIZE); | |
c268433a | 805 | |
d275c051 | 806 | for (offset = 0; offset <= num_insns - count; offset++) |
77d18ded RC |
807 | { |
808 | for (i = 0; i < count; i++) | |
c268433a | 809 | { |
d275c051 | 810 | if ((insns[offset + i] & patterns[i]) != patterns[i]) |
77d18ded RC |
811 | break; |
812 | } | |
813 | if (i == count) | |
814 | break; | |
815 | } | |
d275c051 MK |
816 | |
817 | if (offset <= num_insns - count) | |
818 | return start + offset * HPPA_INSN_SIZE; | |
77d18ded RC |
819 | else |
820 | return 0; | |
821 | } | |
c268433a | 822 | |
77d18ded RC |
823 | static CORE_ADDR |
824 | hppa32_hpux_search_dummy_call_sequence (struct gdbarch *gdbarch, CORE_ADDR pc, | |
825 | int *argreg) | |
826 | { | |
827 | struct objfile *obj; | |
828 | struct obj_section *sec; | |
829 | struct hppa_objfile_private *priv; | |
830 | struct frame_info *frame; | |
831 | struct unwind_table_entry *u; | |
832 | CORE_ADDR addr, rp; | |
833 | char buf[4]; | |
834 | unsigned int insn; | |
835 | ||
836 | sec = find_pc_section (pc); | |
837 | obj = sec->objfile; | |
838 | priv = objfile_data (obj, hppa_objfile_priv_data); | |
839 | ||
840 | if (!priv) | |
841 | priv = hppa_init_objfile_priv_data (obj); | |
842 | if (!priv) | |
8a3fe4f8 | 843 | error (_("Internal error creating objfile private data.")); |
77d18ded RC |
844 | |
845 | /* Use the cached value if we have one. */ | |
846 | if (priv->dummy_call_sequence_addr != 0) | |
847 | { | |
848 | *argreg = priv->dummy_call_sequence_reg; | |
849 | return priv->dummy_call_sequence_addr; | |
850 | } | |
c268433a | 851 | |
77d18ded RC |
852 | /* First try a heuristic; if we are in a shared library call, our return |
853 | pointer is likely to point at an export stub. */ | |
854 | frame = get_current_frame (); | |
855 | rp = frame_unwind_register_unsigned (frame, 2); | |
856 | u = find_unwind_entry (rp); | |
857 | if (u && u->stub_unwind.stub_type == EXPORT) | |
858 | { | |
859 | addr = hppa_hpux_search_pattern (u->region_start, u->region_end, | |
860 | ldsid_pattern, | |
861 | ARRAY_SIZE (ldsid_pattern)); | |
862 | if (addr) | |
863 | goto found_pattern; | |
864 | } | |
c268433a | 865 | |
77d18ded RC |
866 | /* Next thing to try is to look for an export stub. */ |
867 | if (priv->unwind_info) | |
868 | { | |
869 | int i; | |
c268433a | 870 | |
77d18ded RC |
871 | for (i = 0; i < priv->unwind_info->last; i++) |
872 | { | |
873 | struct unwind_table_entry *u; | |
874 | u = &priv->unwind_info->table[i]; | |
875 | if (u->stub_unwind.stub_type == EXPORT) | |
876 | { | |
877 | addr = hppa_hpux_search_pattern (u->region_start, u->region_end, | |
878 | ldsid_pattern, | |
879 | ARRAY_SIZE (ldsid_pattern)); | |
880 | if (addr) | |
881 | { | |
882 | goto found_pattern; | |
883 | } | |
c268433a RC |
884 | } |
885 | } | |
77d18ded | 886 | } |
c268433a | 887 | |
77d18ded RC |
888 | /* Finally, if this is the main executable, try to locate a sequence |
889 | from noshlibs */ | |
890 | addr = hppa_symbol_address ("noshlibs"); | |
891 | sec = find_pc_section (addr); | |
892 | ||
893 | if (sec && sec->objfile == obj) | |
894 | { | |
895 | CORE_ADDR start, end; | |
896 | ||
897 | find_pc_partial_function (addr, NULL, &start, &end); | |
898 | if (start != 0 && end != 0) | |
c268433a | 899 | { |
77d18ded RC |
900 | addr = hppa_hpux_search_pattern (start, end, ldsid_pattern, |
901 | ARRAY_SIZE (ldsid_pattern)); | |
902 | if (addr) | |
903 | goto found_pattern; | |
c268433a | 904 | } |
77d18ded RC |
905 | } |
906 | ||
907 | /* Can't find a suitable sequence. */ | |
908 | return 0; | |
909 | ||
910 | found_pattern: | |
911 | target_read_memory (addr, buf, sizeof (buf)); | |
912 | insn = extract_unsigned_integer (buf, sizeof (buf)); | |
913 | priv->dummy_call_sequence_addr = addr; | |
914 | priv->dummy_call_sequence_reg = (insn >> 21) & 0x1f; | |
915 | ||
916 | *argreg = priv->dummy_call_sequence_reg; | |
917 | return priv->dummy_call_sequence_addr; | |
918 | } | |
919 | ||
920 | static CORE_ADDR | |
921 | hppa64_hpux_search_dummy_call_sequence (struct gdbarch *gdbarch, CORE_ADDR pc, | |
922 | int *argreg) | |
923 | { | |
924 | struct objfile *obj; | |
925 | struct obj_section *sec; | |
926 | struct hppa_objfile_private *priv; | |
927 | CORE_ADDR addr; | |
928 | struct minimal_symbol *msym; | |
929 | int i; | |
930 | ||
931 | sec = find_pc_section (pc); | |
932 | obj = sec->objfile; | |
933 | priv = objfile_data (obj, hppa_objfile_priv_data); | |
934 | ||
935 | if (!priv) | |
936 | priv = hppa_init_objfile_priv_data (obj); | |
937 | if (!priv) | |
8a3fe4f8 | 938 | error (_("Internal error creating objfile private data.")); |
77d18ded RC |
939 | |
940 | /* Use the cached value if we have one. */ | |
941 | if (priv->dummy_call_sequence_addr != 0) | |
942 | { | |
943 | *argreg = priv->dummy_call_sequence_reg; | |
944 | return priv->dummy_call_sequence_addr; | |
945 | } | |
946 | ||
947 | /* FIXME: Without stub unwind information, locating a suitable sequence is | |
948 | fairly difficult. For now, we implement a very naive and inefficient | |
949 | scheme; try to read in blocks of code, and look for a "bve,n (rp)" | |
950 | instruction. These are likely to occur at the end of functions, so | |
951 | we only look at the last two instructions of each function. */ | |
952 | for (i = 0, msym = obj->msymbols; i < obj->minimal_symbol_count; i++, msym++) | |
953 | { | |
954 | CORE_ADDR begin, end; | |
955 | char *name; | |
d275c051 | 956 | gdb_byte buf[2 * HPPA_INSN_SIZE]; |
77d18ded RC |
957 | int offset; |
958 | ||
959 | find_pc_partial_function (SYMBOL_VALUE_ADDRESS (msym), &name, | |
960 | &begin, &end); | |
961 | ||
81092a3e | 962 | if (name == NULL || begin == 0 || end == 0) |
77d18ded RC |
963 | continue; |
964 | ||
d275c051 | 965 | if (target_read_memory (end - sizeof (buf), buf, sizeof (buf)) == 0) |
c268433a | 966 | { |
d275c051 | 967 | for (offset = 0; offset < sizeof (buf); offset++) |
77d18ded RC |
968 | { |
969 | unsigned int insn; | |
970 | ||
d275c051 | 971 | insn = extract_unsigned_integer (buf + offset, HPPA_INSN_SIZE); |
77d18ded RC |
972 | if (insn == 0xe840d002) /* bve,n (rp) */ |
973 | { | |
d275c051 | 974 | addr = (end - sizeof (buf)) + offset; |
77d18ded RC |
975 | goto found_pattern; |
976 | } | |
977 | } | |
978 | } | |
979 | } | |
980 | ||
981 | /* Can't find a suitable sequence. */ | |
982 | return 0; | |
983 | ||
984 | found_pattern: | |
985 | priv->dummy_call_sequence_addr = addr; | |
986 | /* Right now we only look for a "bve,l (rp)" sequence, so the register is | |
987 | always HPPA_RP_REGNUM. */ | |
988 | priv->dummy_call_sequence_reg = HPPA_RP_REGNUM; | |
989 | ||
990 | *argreg = priv->dummy_call_sequence_reg; | |
991 | return priv->dummy_call_sequence_addr; | |
992 | } | |
993 | ||
994 | static CORE_ADDR | |
995 | hppa_hpux_find_import_stub_for_addr (CORE_ADDR funcaddr) | |
996 | { | |
997 | struct objfile *objfile; | |
998 | struct minimal_symbol *funsym, *stubsym; | |
999 | CORE_ADDR stubaddr; | |
1000 | ||
1001 | funsym = lookup_minimal_symbol_by_pc (funcaddr); | |
1002 | stubaddr = 0; | |
1003 | ||
1004 | ALL_OBJFILES (objfile) | |
1005 | { | |
1006 | stubsym = lookup_minimal_symbol_solib_trampoline | |
1007 | (SYMBOL_LINKAGE_NAME (funsym), objfile); | |
1008 | ||
1009 | if (stubsym) | |
1010 | { | |
1011 | struct unwind_table_entry *u; | |
1012 | ||
1013 | u = find_unwind_entry (SYMBOL_VALUE (stubsym)); | |
1014 | if (u == NULL | |
1015 | || (u->stub_unwind.stub_type != IMPORT | |
1016 | && u->stub_unwind.stub_type != IMPORT_SHLIB)) | |
1017 | continue; | |
1018 | ||
1019 | stubaddr = SYMBOL_VALUE (stubsym); | |
1020 | ||
1021 | /* If we found an IMPORT stub, then we can stop searching; | |
1022 | if we found an IMPORT_SHLIB, we want to continue the search | |
1023 | in the hopes that we will find an IMPORT stub. */ | |
1024 | if (u->stub_unwind.stub_type == IMPORT) | |
1025 | break; | |
1026 | } | |
1027 | } | |
1028 | ||
1029 | return stubaddr; | |
1030 | } | |
1031 | ||
1032 | static int | |
1033 | hppa_hpux_sr_for_addr (CORE_ADDR addr) | |
1034 | { | |
1035 | int sr; | |
1036 | /* The space register to use is encoded in the top 2 bits of the address. */ | |
1037 | sr = addr >> (gdbarch_tdep (current_gdbarch)->bytes_per_address * 8 - 2); | |
1038 | return sr + 4; | |
1039 | } | |
1040 | ||
1041 | static CORE_ADDR | |
1042 | hppa_hpux_find_dummy_bpaddr (CORE_ADDR addr) | |
1043 | { | |
1044 | /* In order for us to restore the space register to its starting state, | |
1045 | we need the dummy trampoline to return to the an instruction address in | |
1046 | the same space as where we started the call. We used to place the | |
1047 | breakpoint near the current pc, however, this breaks nested dummy calls | |
1048 | as the nested call will hit the breakpoint address and terminate | |
1049 | prematurely. Instead, we try to look for an address in the same space to | |
1050 | put the breakpoint. | |
1051 | ||
1052 | This is similar in spirit to putting the breakpoint at the "entry point" | |
1053 | of an executable. */ | |
1054 | ||
1055 | struct obj_section *sec; | |
1056 | struct unwind_table_entry *u; | |
1057 | struct minimal_symbol *msym; | |
1058 | CORE_ADDR func; | |
1059 | int i; | |
1060 | ||
1061 | sec = find_pc_section (addr); | |
1062 | if (sec) | |
1063 | { | |
1064 | /* First try the lowest address in the section; we can use it as long | |
1065 | as it is "regular" code (i.e. not a stub) */ | |
1066 | u = find_unwind_entry (sec->addr); | |
1067 | if (!u || u->stub_unwind.stub_type == 0) | |
1068 | return sec->addr; | |
1069 | ||
1070 | /* Otherwise, we need to find a symbol for a regular function. We | |
1071 | do this by walking the list of msymbols in the objfile. The symbol | |
1072 | we find should not be the same as the function that was passed in. */ | |
1073 | ||
1074 | /* FIXME: this is broken, because we can find a function that will be | |
1075 | called by the dummy call target function, which will still not | |
1076 | work. */ | |
1077 | ||
1078 | find_pc_partial_function (addr, NULL, &func, NULL); | |
1079 | for (i = 0, msym = sec->objfile->msymbols; | |
1080 | i < sec->objfile->minimal_symbol_count; | |
1081 | i++, msym++) | |
1082 | { | |
1083 | u = find_unwind_entry (SYMBOL_VALUE_ADDRESS (msym)); | |
1084 | if (func != SYMBOL_VALUE_ADDRESS (msym) | |
1085 | && (!u || u->stub_unwind.stub_type == 0)) | |
1086 | return SYMBOL_VALUE_ADDRESS (msym); | |
c268433a | 1087 | } |
77d18ded | 1088 | } |
c268433a | 1089 | |
8a3fe4f8 AC |
1090 | warning (_("Cannot find suitable address to place dummy breakpoint; nested " |
1091 | "calls may fail.")); | |
77d18ded RC |
1092 | return addr - 4; |
1093 | } | |
1094 | ||
1095 | static CORE_ADDR | |
1096 | hppa_hpux_push_dummy_code (struct gdbarch *gdbarch, CORE_ADDR sp, | |
1097 | CORE_ADDR funcaddr, int using_gcc, | |
1098 | struct value **args, int nargs, | |
1099 | struct type *value_type, | |
e4fd649a UW |
1100 | CORE_ADDR *real_pc, CORE_ADDR *bp_addr, |
1101 | struct regcache *regcache) | |
77d18ded RC |
1102 | { |
1103 | CORE_ADDR pc, stubaddr; | |
9846e541 | 1104 | int argreg = 0; |
77d18ded RC |
1105 | |
1106 | pc = read_pc (); | |
1107 | ||
1108 | /* Note: we don't want to pass a function descriptor here; push_dummy_call | |
1109 | fills in the PIC register for us. */ | |
1110 | funcaddr = gdbarch_convert_from_func_ptr_addr (gdbarch, funcaddr, NULL); | |
1111 | ||
1112 | /* The simple case is where we call a function in the same space that we are | |
1113 | currently in; in that case we don't really need to do anything. */ | |
1114 | if (hppa_hpux_sr_for_addr (pc) == hppa_hpux_sr_for_addr (funcaddr)) | |
1115 | { | |
1116 | /* Intraspace call. */ | |
1117 | *bp_addr = hppa_hpux_find_dummy_bpaddr (pc); | |
1118 | *real_pc = funcaddr; | |
e4fd649a | 1119 | regcache_cooked_write_unsigned (regcache, HPPA_RP_REGNUM, *bp_addr); |
77d18ded RC |
1120 | |
1121 | return sp; | |
1122 | } | |
1123 | ||
1124 | /* In order to make an interspace call, we need to go through a stub. | |
1125 | gcc supplies an appropriate stub called "__gcc_plt_call", however, if | |
1126 | an application is compiled with HP compilers then this stub is not | |
1127 | available. We used to fallback to "__d_plt_call", however that stub | |
1128 | is not entirely useful for us because it doesn't do an interspace | |
1129 | return back to the caller. Also, on hppa64-hpux, there is no | |
1130 | __gcc_plt_call available. In order to keep the code uniform, we | |
1131 | instead don't use either of these stubs, but instead write our own | |
1132 | onto the stack. | |
1133 | ||
1134 | A problem arises since the stack is located in a different space than | |
1135 | code, so in order to branch to a stack stub, we will need to do an | |
1136 | interspace branch. Previous versions of gdb did this by modifying code | |
1137 | at the current pc and doing single-stepping to set the pcsq. Since this | |
1138 | is highly undesirable, we use a different scheme: | |
1139 | ||
1140 | All we really need to do the branch to the stub is a short instruction | |
1141 | sequence like this: | |
1142 | ||
1143 | PA1.1: | |
1144 | ldsid (rX),r1 | |
1145 | mtsp r1,sr0 | |
1146 | be,n (sr0,rX) | |
1147 | ||
1148 | PA2.0: | |
1149 | bve,n (sr0,rX) | |
1150 | ||
1151 | Instead of writing these sequences ourselves, we can find it in | |
1152 | the instruction stream that belongs to the current space. While this | |
1153 | seems difficult at first, we are actually guaranteed to find the sequences | |
1154 | in several places: | |
1155 | ||
1156 | For 32-bit code: | |
1157 | - in export stubs for shared libraries | |
1158 | - in the "noshlibs" routine in the main module | |
1159 | ||
1160 | For 64-bit code: | |
1161 | - at the end of each "regular" function | |
1162 | ||
1163 | We cache the address of these sequences in the objfile's private data | |
1164 | since these operations can potentially be quite expensive. | |
1165 | ||
1166 | So, what we do is: | |
1167 | - write a stack trampoline | |
1168 | - look for a suitable instruction sequence in the current space | |
1169 | - point the sequence at the trampoline | |
1170 | - set the return address of the trampoline to the current space | |
1171 | (see hppa_hpux_find_dummy_call_bpaddr) | |
1172 | - set the continuing address of the "dummy code" as the sequence. | |
1173 | ||
1174 | */ | |
1175 | ||
1176 | if (IS_32BIT_TARGET (gdbarch)) | |
1177 | { | |
1178 | static unsigned int hppa32_tramp[] = { | |
1179 | 0x0fdf1291, /* stw r31,-8(,sp) */ | |
1180 | 0x02c010a1, /* ldsid (,r22),r1 */ | |
1181 | 0x00011820, /* mtsp r1,sr0 */ | |
1182 | 0xe6c00000, /* be,l 0(sr0,r22),%sr0,%r31 */ | |
1183 | 0x081f0242, /* copy r31,rp */ | |
1184 | 0x0fd11082, /* ldw -8(,sp),rp */ | |
1185 | 0x004010a1, /* ldsid (,rp),r1 */ | |
1186 | 0x00011820, /* mtsp r1,sr0 */ | |
1187 | 0xe0400000, /* be 0(sr0,rp) */ | |
1188 | 0x08000240 /* nop */ | |
1189 | }; | |
1190 | ||
1191 | /* for hppa32, we must call the function through a stub so that on | |
1192 | return it can return to the space of our trampoline. */ | |
1193 | stubaddr = hppa_hpux_find_import_stub_for_addr (funcaddr); | |
1194 | if (stubaddr == 0) | |
8a3fe4f8 AC |
1195 | error (_("Cannot call external function not referenced by application " |
1196 | "(no import stub).\n")); | |
e4fd649a | 1197 | regcache_cooked_write_unsigned (regcache, 22, stubaddr); |
77d18ded RC |
1198 | |
1199 | write_memory (sp, (char *)&hppa32_tramp, sizeof (hppa32_tramp)); | |
1200 | ||
1201 | *bp_addr = hppa_hpux_find_dummy_bpaddr (pc); | |
e4fd649a | 1202 | regcache_cooked_write_unsigned (regcache, 31, *bp_addr); |
c268433a | 1203 | |
77d18ded RC |
1204 | *real_pc = hppa32_hpux_search_dummy_call_sequence (gdbarch, pc, &argreg); |
1205 | if (*real_pc == 0) | |
8a3fe4f8 | 1206 | error (_("Cannot make interspace call from here.")); |
77d18ded | 1207 | |
e4fd649a | 1208 | regcache_cooked_write_unsigned (regcache, argreg, sp); |
77d18ded RC |
1209 | |
1210 | sp += sizeof (hppa32_tramp); | |
c268433a RC |
1211 | } |
1212 | else | |
1213 | { | |
77d18ded RC |
1214 | static unsigned int hppa64_tramp[] = { |
1215 | 0xeac0f000, /* bve,l (r22),%r2 */ | |
1216 | 0x0fdf12d1, /* std r31,-8(,sp) */ | |
1217 | 0x0fd110c2, /* ldd -8(,sp),rp */ | |
1218 | 0xe840d002, /* bve,n (rp) */ | |
1219 | 0x08000240 /* nop */ | |
1220 | }; | |
1221 | ||
1222 | /* for hppa64, we don't need to call through a stub; all functions | |
1223 | return via a bve. */ | |
e4fd649a | 1224 | regcache_cooked_write_unsigned (regcache, 22, funcaddr); |
77d18ded RC |
1225 | write_memory (sp, (char *)&hppa64_tramp, sizeof (hppa64_tramp)); |
1226 | ||
1227 | *bp_addr = pc - 4; | |
e4fd649a | 1228 | regcache_cooked_write_unsigned (regcache, 31, *bp_addr); |
c268433a | 1229 | |
77d18ded RC |
1230 | *real_pc = hppa64_hpux_search_dummy_call_sequence (gdbarch, pc, &argreg); |
1231 | if (*real_pc == 0) | |
8a3fe4f8 | 1232 | error (_("Cannot make interspace call from here.")); |
c268433a | 1233 | |
e4fd649a | 1234 | regcache_cooked_write_unsigned (regcache, argreg, sp); |
c268433a | 1235 | |
77d18ded | 1236 | sp += sizeof (hppa64_tramp); |
c268433a RC |
1237 | } |
1238 | ||
77d18ded | 1239 | sp = gdbarch_frame_align (gdbarch, sp); |
c268433a RC |
1240 | |
1241 | return sp; | |
1242 | } | |
77d18ded | 1243 | |
cc72850f MK |
1244 | \f |
1245 | ||
08d53055 MK |
1246 | static void |
1247 | hppa_hpux_supply_ss_narrow (struct regcache *regcache, | |
1248 | int regnum, const char *save_state) | |
1249 | { | |
1250 | const char *ss_narrow = save_state + HPPA_HPUX_SS_NARROW_OFFSET; | |
1251 | int i, offset = 0; | |
1252 | ||
1253 | for (i = HPPA_R1_REGNUM; i < HPPA_FP0_REGNUM; i++) | |
1254 | { | |
1255 | if (regnum == i || regnum == -1) | |
1256 | regcache_raw_supply (regcache, i, ss_narrow + offset); | |
1257 | ||
1258 | offset += 4; | |
1259 | } | |
1260 | } | |
1261 | ||
1262 | static void | |
1263 | hppa_hpux_supply_ss_fpblock (struct regcache *regcache, | |
1264 | int regnum, const char *save_state) | |
1265 | { | |
1266 | const char *ss_fpblock = save_state + HPPA_HPUX_SS_FPBLOCK_OFFSET; | |
1267 | int i, offset = 0; | |
1268 | ||
1269 | /* FIXME: We view the floating-point state as 64 single-precision | |
1270 | registers for 32-bit code, and 32 double-precision register for | |
1271 | 64-bit code. This distinction is artificial and should be | |
1272 | eliminated. If that ever happens, we should remove the if-clause | |
1273 | below. */ | |
1274 | ||
1275 | if (register_size (get_regcache_arch (regcache), HPPA_FP0_REGNUM) == 4) | |
1276 | { | |
1277 | for (i = HPPA_FP0_REGNUM; i < HPPA_FP0_REGNUM + 64; i++) | |
1278 | { | |
1279 | if (regnum == i || regnum == -1) | |
1280 | regcache_raw_supply (regcache, i, ss_fpblock + offset); | |
1281 | ||
1282 | offset += 4; | |
1283 | } | |
1284 | } | |
1285 | else | |
1286 | { | |
1287 | for (i = HPPA_FP0_REGNUM; i < HPPA_FP0_REGNUM + 32; i++) | |
1288 | { | |
1289 | if (regnum == i || regnum == -1) | |
1290 | regcache_raw_supply (regcache, i, ss_fpblock + offset); | |
1291 | ||
1292 | offset += 8; | |
1293 | } | |
1294 | } | |
1295 | } | |
1296 | ||
1297 | static void | |
1298 | hppa_hpux_supply_ss_wide (struct regcache *regcache, | |
1299 | int regnum, const char *save_state) | |
1300 | { | |
1301 | const char *ss_wide = save_state + HPPA_HPUX_SS_WIDE_OFFSET; | |
1302 | int i, offset = 8; | |
1303 | ||
1304 | if (register_size (get_regcache_arch (regcache), HPPA_R1_REGNUM) == 4) | |
1305 | offset += 4; | |
1306 | ||
1307 | for (i = HPPA_R1_REGNUM; i < HPPA_FP0_REGNUM; i++) | |
1308 | { | |
1309 | if (regnum == i || regnum == -1) | |
1310 | regcache_raw_supply (regcache, i, ss_wide + offset); | |
1311 | ||
1312 | offset += 8; | |
1313 | } | |
1314 | } | |
1315 | ||
1316 | static void | |
1317 | hppa_hpux_supply_save_state (const struct regset *regset, | |
1318 | struct regcache *regcache, | |
1319 | int regnum, const void *regs, size_t len) | |
1320 | { | |
1321 | const char *proc_info = regs; | |
1322 | const char *save_state = proc_info + 8; | |
1323 | ULONGEST flags; | |
1324 | ||
1325 | flags = extract_unsigned_integer (save_state + HPPA_HPUX_SS_FLAGS_OFFSET, 4); | |
1326 | if (regnum == -1 || regnum == HPPA_FLAGS_REGNUM) | |
1327 | { | |
1328 | struct gdbarch *arch = get_regcache_arch (regcache); | |
1329 | size_t size = register_size (arch, HPPA_FLAGS_REGNUM); | |
1330 | char buf[8]; | |
1331 | ||
1332 | store_unsigned_integer (buf, size, flags); | |
1333 | regcache_raw_supply (regcache, HPPA_FLAGS_REGNUM, buf); | |
1334 | } | |
1335 | ||
1336 | /* If the SS_WIDEREGS flag is set, we really do need the full | |
1337 | `struct save_state'. */ | |
1338 | if (flags & HPPA_HPUX_SS_WIDEREGS && len < HPPA_HPUX_SAVE_STATE_SIZE) | |
8a3fe4f8 | 1339 | error (_("Register set contents too small")); |
08d53055 MK |
1340 | |
1341 | if (flags & HPPA_HPUX_SS_WIDEREGS) | |
1342 | hppa_hpux_supply_ss_wide (regcache, regnum, save_state); | |
1343 | else | |
1344 | hppa_hpux_supply_ss_narrow (regcache, regnum, save_state); | |
1345 | ||
1346 | hppa_hpux_supply_ss_fpblock (regcache, regnum, save_state); | |
1347 | } | |
1348 | ||
1349 | /* HP-UX register set. */ | |
1350 | ||
1351 | static struct regset hppa_hpux_regset = | |
1352 | { | |
1353 | NULL, | |
1354 | hppa_hpux_supply_save_state | |
1355 | }; | |
1356 | ||
1357 | static const struct regset * | |
1358 | hppa_hpux_regset_from_core_section (struct gdbarch *gdbarch, | |
1359 | const char *sect_name, size_t sect_size) | |
1360 | { | |
1361 | if (strcmp (sect_name, ".reg") == 0 | |
1362 | && sect_size >= HPPA_HPUX_PA89_SAVE_STATE_SIZE + 8) | |
1363 | return &hppa_hpux_regset; | |
1364 | ||
1365 | return NULL; | |
1366 | } | |
1367 | \f | |
1368 | ||
cc72850f MK |
1369 | /* Bit in the `ss_flag' member of `struct save_state' that indicates |
1370 | the state was saved from a system call. From | |
1371 | <machine/save_state.h>. */ | |
1372 | #define HPPA_HPUX_SS_INSYSCALL 0x02 | |
1373 | ||
1374 | static CORE_ADDR | |
61a1198a | 1375 | hppa_hpux_read_pc (struct regcache *regcache) |
cc72850f MK |
1376 | { |
1377 | ULONGEST flags; | |
1378 | ||
1379 | /* If we're currently in a system call return the contents of %r31. */ | |
61a1198a | 1380 | regcache_cooked_read_unsigned (regcache, HPPA_FLAGS_REGNUM, &flags); |
cc72850f | 1381 | if (flags & HPPA_HPUX_SS_INSYSCALL) |
61a1198a UW |
1382 | { |
1383 | ULONGEST pc; | |
1384 | regcache_cooked_read_unsigned (regcache, HPPA_R31_REGNUM, &pc); | |
1385 | return pc & ~0x3; | |
1386 | } | |
cc72850f | 1387 | |
61a1198a | 1388 | return hppa_read_pc (regcache); |
cc72850f MK |
1389 | } |
1390 | ||
1391 | static void | |
61a1198a | 1392 | hppa_hpux_write_pc (struct regcache *regcache, CORE_ADDR pc) |
cc72850f MK |
1393 | { |
1394 | ULONGEST flags; | |
1395 | ||
1396 | /* If we're currently in a system call also write PC into %r31. */ | |
61a1198a | 1397 | regcache_cooked_read_unsigned (regcache, HPPA_FLAGS_REGNUM, &flags); |
cc72850f | 1398 | if (flags & HPPA_HPUX_SS_INSYSCALL) |
61a1198a | 1399 | regcache_cooked_write_unsigned (regcache, HPPA_R31_REGNUM, pc | 0x3); |
cc72850f | 1400 | |
61a1198a | 1401 | return hppa_write_pc (regcache, pc); |
cc72850f MK |
1402 | } |
1403 | ||
1404 | static CORE_ADDR | |
1405 | hppa_hpux_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame) | |
1406 | { | |
1407 | ULONGEST flags; | |
1408 | ||
1409 | /* If we're currently in a system call return the contents of %r31. */ | |
1410 | flags = frame_unwind_register_unsigned (next_frame, HPPA_FLAGS_REGNUM); | |
1411 | if (flags & HPPA_HPUX_SS_INSYSCALL) | |
1412 | return frame_unwind_register_unsigned (next_frame, HPPA_R31_REGNUM) & ~0x3; | |
1413 | ||
1414 | return hppa_unwind_pc (gdbarch, next_frame); | |
1415 | } | |
1416 | \f | |
c268433a | 1417 | |
f77a2124 RC |
1418 | /* Given the current value of the pc, check to see if it is inside a stub, and |
1419 | if so, change the value of the pc to point to the caller of the stub. | |
1420 | NEXT_FRAME is the next frame in the current list of frames. | |
1421 | BASE contains to stack frame base of the current frame. | |
1422 | SAVE_REGS is the register file stored in the frame cache. */ | |
1423 | static void | |
1424 | hppa_hpux_unwind_adjust_stub (struct frame_info *next_frame, CORE_ADDR base, | |
1425 | struct trad_frame_saved_reg *saved_regs) | |
1426 | { | |
1427 | int optimized, realreg; | |
1428 | enum lval_type lval; | |
1429 | CORE_ADDR addr; | |
1430 | char buffer[sizeof(ULONGEST)]; | |
1431 | ULONGEST val; | |
1432 | CORE_ADDR stubpc; | |
1433 | struct unwind_table_entry *u; | |
1434 | ||
1435 | trad_frame_get_prev_register (next_frame, saved_regs, | |
1436 | HPPA_PCOQ_HEAD_REGNUM, | |
1437 | &optimized, &lval, &addr, &realreg, buffer); | |
1438 | val = extract_unsigned_integer (buffer, | |
1439 | register_size (get_frame_arch (next_frame), | |
1440 | HPPA_PCOQ_HEAD_REGNUM)); | |
1441 | ||
1442 | u = find_unwind_entry (val); | |
1443 | if (u && u->stub_unwind.stub_type == EXPORT) | |
1444 | { | |
819844ad UW |
1445 | stubpc = read_memory_integer |
1446 | (base - 24, gdbarch_ptr_bit (current_gdbarch) / 8); | |
f77a2124 RC |
1447 | trad_frame_set_value (saved_regs, HPPA_PCOQ_HEAD_REGNUM, stubpc); |
1448 | } | |
1449 | else if (hppa_symbol_address ("__gcc_plt_call") | |
1450 | == get_pc_function_start (val)) | |
1451 | { | |
819844ad UW |
1452 | stubpc = read_memory_integer |
1453 | (base - 8, gdbarch_ptr_bit (current_gdbarch) / 8); | |
f77a2124 RC |
1454 | trad_frame_set_value (saved_regs, HPPA_PCOQ_HEAD_REGNUM, stubpc); |
1455 | } | |
1456 | } | |
1457 | ||
7d773d96 JB |
1458 | static void |
1459 | hppa_hpux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
1460 | { | |
abc485a1 RC |
1461 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
1462 | ||
77d18ded | 1463 | if (IS_32BIT_TARGET (gdbarch)) |
84674fe1 | 1464 | tdep->in_solib_call_trampoline = hppa32_hpux_in_solib_call_trampoline; |
abc485a1 | 1465 | else |
84674fe1 | 1466 | tdep->in_solib_call_trampoline = hppa64_hpux_in_solib_call_trampoline; |
abc485a1 | 1467 | |
f77a2124 RC |
1468 | tdep->unwind_adjust_stub = hppa_hpux_unwind_adjust_stub; |
1469 | ||
3cd36e7c MK |
1470 | set_gdbarch_in_solib_return_trampoline |
1471 | (gdbarch, hppa_hpux_in_solib_return_trampoline); | |
abc485a1 | 1472 | set_gdbarch_skip_trampoline_code (gdbarch, hppa_hpux_skip_trampoline_code); |
43613416 | 1473 | |
c268433a RC |
1474 | set_gdbarch_push_dummy_code (gdbarch, hppa_hpux_push_dummy_code); |
1475 | set_gdbarch_call_dummy_location (gdbarch, ON_STACK); | |
1476 | ||
cc72850f MK |
1477 | set_gdbarch_read_pc (gdbarch, hppa_hpux_read_pc); |
1478 | set_gdbarch_write_pc (gdbarch, hppa_hpux_write_pc); | |
1479 | set_gdbarch_unwind_pc (gdbarch, hppa_hpux_unwind_pc); | |
6d350bb5 UW |
1480 | set_gdbarch_skip_permanent_breakpoint |
1481 | (gdbarch, hppa_skip_permanent_breakpoint); | |
cc72850f | 1482 | |
08d53055 MK |
1483 | set_gdbarch_regset_from_core_section |
1484 | (gdbarch, hppa_hpux_regset_from_core_section); | |
1485 | ||
43613416 | 1486 | frame_unwind_append_sniffer (gdbarch, hppa_hpux_sigtramp_unwind_sniffer); |
7d773d96 | 1487 | } |
60e1ff27 | 1488 | |
273f8429 JB |
1489 | static void |
1490 | hppa_hpux_som_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
1491 | { | |
fdd72f95 RC |
1492 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
1493 | ||
1494 | tdep->is_elf = 0; | |
c268433a | 1495 | |
77d18ded RC |
1496 | tdep->find_global_pointer = hppa32_hpux_find_global_pointer; |
1497 | ||
7d773d96 | 1498 | hppa_hpux_init_abi (info, gdbarch); |
acf86d54 | 1499 | som_solib_select (tdep); |
273f8429 JB |
1500 | } |
1501 | ||
1502 | static void | |
1503 | hppa_hpux_elf_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
1504 | { | |
fdd72f95 RC |
1505 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
1506 | ||
1507 | tdep->is_elf = 1; | |
77d18ded RC |
1508 | tdep->find_global_pointer = hppa64_hpux_find_global_pointer; |
1509 | ||
7d773d96 | 1510 | hppa_hpux_init_abi (info, gdbarch); |
acf86d54 | 1511 | pa64_solib_select (tdep); |
273f8429 JB |
1512 | } |
1513 | ||
08d53055 MK |
1514 | static enum gdb_osabi |
1515 | hppa_hpux_core_osabi_sniffer (bfd *abfd) | |
1516 | { | |
1517 | if (strcmp (bfd_get_target (abfd), "hpux-core") == 0) | |
1518 | return GDB_OSABI_HPUX_SOM; | |
6b79fde8 RC |
1519 | else if (strcmp (bfd_get_target (abfd), "elf64-hppa") == 0) |
1520 | { | |
1521 | asection *section; | |
1522 | ||
1523 | section = bfd_get_section_by_name (abfd, ".kernel"); | |
1524 | if (section) | |
1525 | { | |
1526 | bfd_size_type size; | |
1527 | char *contents; | |
1528 | ||
1529 | size = bfd_section_size (abfd, section); | |
1530 | contents = alloca (size); | |
1531 | if (bfd_get_section_contents (abfd, section, contents, | |
1532 | (file_ptr) 0, size) | |
1533 | && strcmp (contents, "HP-UX") == 0) | |
1534 | return GDB_OSABI_HPUX_ELF; | |
1535 | } | |
1536 | } | |
08d53055 MK |
1537 | |
1538 | return GDB_OSABI_UNKNOWN; | |
1539 | } | |
1540 | ||
273f8429 JB |
1541 | void |
1542 | _initialize_hppa_hpux_tdep (void) | |
1543 | { | |
08d53055 MK |
1544 | /* BFD doesn't set a flavour for HP-UX style core files. It doesn't |
1545 | set the architecture either. */ | |
1546 | gdbarch_register_osabi_sniffer (bfd_arch_unknown, | |
1547 | bfd_target_unknown_flavour, | |
1548 | hppa_hpux_core_osabi_sniffer); | |
6b79fde8 RC |
1549 | gdbarch_register_osabi_sniffer (bfd_arch_hppa, |
1550 | bfd_target_elf_flavour, | |
1551 | hppa_hpux_core_osabi_sniffer); | |
08d53055 | 1552 | |
05816f70 | 1553 | gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_HPUX_SOM, |
273f8429 | 1554 | hppa_hpux_som_init_abi); |
51db5742 | 1555 | gdbarch_register_osabi (bfd_arch_hppa, bfd_mach_hppa20w, GDB_OSABI_HPUX_ELF, |
273f8429 JB |
1556 | hppa_hpux_elf_init_abi); |
1557 | } |